These aren't referenced from Chromium code any more.

BUG=chromium:550487

Change-Id: Ie4094667ec5f739efd9f1253ffdb779deaf3cebc
Reviewed-on: https://chromium-review.googlesource.com/319162Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Kenneth Russell <kbr@chromium.org>